Emerson NGA2000 Reference Manual page 68

Reference Manual
748384-C
September 2003
AUTO_REIGNIT
Direction
Binding
Type
Value range
Units
Description
Usage
See also
AUTOIGNITE
Direction
Binding
Type
Value range
Units
Description
Usage
See also
BAR_ENABLE
Direction
Binding
Type
Value range
Units
Description
Usage
See also
BAR_INTERNAL
Direction
Binding
Type
Value range
Units
Description
Usage
See also
2-6 Analyzer Variables
Bidirectional
None
Enumerated
DISABLED; ENABLED
None
FID only; controls the auto-re-ignition function
When enabled, allows the ignition function to attempt to ignite the flame a number of
times if the first time fails. This does not allow the FID to re-ignite its flame if the
flame goes out - for safety reasons this is a manual feature only.
AUTOIGNITE
Bidirectional
None
Enumerated
DISABLED; ENABLED
None
FID only; enables the autoignition function.
Enables the automatic ignition function. This allows the FID to go through the correct
sequence of making the mixture richer, firing the glowplug, and determining whether
a flame has ignited. If this variable is set to DISABLED, the user has to manually set
the mixture and the glow plug firing.
AUTO_REIGNIT
Bidirectional
BAR_ENABLE
Enumerated
DISABLED; USE REMOTE READING; TRANSMIT LOCAL READING; USE LOCAL
READING
None
Controls how the analyzer deals with BAROMETER
Selects whether the analyzer uses its internal pressure reading if any, or a network
reading, or transmits its reading as BAROMETER. Only one analyzer in a system
should transmit BAROMETER at once. If more than one do, BAROMETER win
switch between the two values provided by the analyzers, producing an unstable
PVA value.
BAROMETER
PVA
Output
BAR_INTERNAL
Floating point
1013 ± 3% except for NDIRs ± about 50%
hPa
NDIR or PMD only; internal measurement of the sample exhaust pressure.
Reported value of the internally measured pressure, as distinct from the network
readable pressure BAROMETER. The analyzer uses BAR_INTERNAL if it is set to
use its internal pressure measurement, BAROMETER if set to use the external one.
BAROMETER
BAR_ENABLE
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management